– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 9 pm Sat 20 Dec Local TimeUpdates in: hr min sUpdate imminent
Issued: 9 pm Sat 20 Dec Local Time
Updates in:
Update imminent hr min s
Issued: 9 pm Sat 20 Dec Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–4 Weather SummaryMild with heavy rain (total 25mm), heaviest during Sat night. Becoming colder with a moderate fall of snow heaviest on Sun night. Temperatures will be slightly above freezing (max 3°C on Sat night, min 1°C on Sun night). Wind will be generally light. | Days 5–7 Weather SummaryLight rain (total 3mm), mostly falling on Thu morning. Freeze-thaw conditions (max 4°C on Thu morning, min 0°C on Wed night). Wind will be generally light. | ||||||||||||||||||
Sunday 21 | Monday 22 | Tuesday 23 | Wednesday 24 | Thursday 25 | Friday 26 | ||||||||||||||
night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  | |  |  | |  |  | |  | | |  | | | | | |  | |
heavy rain | light rain | light rain | heavy snow | light snow | light snow | light snow | cloudy | light snow | light rain | light rain | cloudy | some clouds | light rain | light rain | light rain | light rain | cloudy | clear | |
km/h | |||||||||||||||||||
 |  |  |  |  |  |  | |||||||||||||
— | — | — | 11 | 1 | 2 | 2 | — | 1 | — | — | — | — | — | — | — | — | — | — | |
18 | 2 | 1.6 | 4 | — | — | — | — | — | 0.1 | 0.5 | — | — | 0.8 | 0.5 | 0.3 | 0.4 | — | — | |
max °C | 3 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 4 | 3 | 3 | 4 | 3 | 1 |
min °C | 3 | 3 | 3 | 1 | 2 | 2 | 1 | 1 | 1 | 1 | 2 | 1 | 0 | 3 | 2 | 1 | 4 | 2 | 1 |
0 | 0 | -1 | -2 | -2 | -3 | -3 | -3 | -1 | -1 | 2 | 1 | -2 | 1 | 0 | -1 | 2 | 2 | 1 | |
950 | 1050 | 1050 | 800 | 750 | 800 | 700 | 750 | 750 | 1150 | 950 | 800 | 850 | 1700 | 1050 | 1500 | 1150 | 1400 | 1250 | |
Cloud base (m) | 550 | 550 | 550 | 550 | 600 | 550 | 550 | 550 | 600 | 1500 | 2000 | 600 | 600 | 2350 | 1450 | 1950 | 600 | 600 | 1600 |
 | — | 7:58 | — | — | 7:58 | — | — | 7:58 | — | — | 7:58 | — | — | 7:58 | — | — | 8:00 | — | — |
 | — | — | 4:14 | — | — | 4:14 | — | — | 4:15 | — | — | 4:15 | — | — | 4:15 | — | — | 4:16 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: Mild with heavy rain (total 25mm), heaviest during Sat night. Becoming colder with a moderate fall of snow heaviest on Sun night. Temperatures will be slightly above freezing (max 3°C on Sat night, min 1°C on Sun night). Wind will be generally light.
South Twin Sister Weather (Days 3-6):
Light rain (total 3mm), mostly falling on Thu morning. Freeze-thaw conditions (max 4°C on Thu morning, min 0°C on Wed night). Wind will be generally light.
This table gives the weather forecast for South Twin Sister at the specific elevation of 500 m. Our advanced weather models allow us to provide distinct weather forecasts for several elevations of South Twin Sister. To see the weather forecasts for the other elevations, use the tab navigation above the table. For a wider overview of the weather, consult the Weather Map of Washington.